fix gcc warning in test

diff --git a/tests/compile/libc_all.pyx b/tests/compile/libc_all.pyx
index 85a7a54bb2b1bbebb9d032855ae78e1f294e3589..8b2326232e8748fb74cbfc4314ed8c8c18583f1a 100644 (file)
--- a/tests/compile/libc_all.pyx
+++ b/tests/compile/libc_all.pyx
@@ -34,6 +34,6 @@ from libc.stdio  cimport *
 from libc.stdlib cimport *
 from libc.string cimport *
 
-libc.stdio.printf("hello\n")
-stdio.printf("hello\n")
-printf("hello\n")
+libc.stdio.printf("hello %s\n", b"world")
+stdio.printf("hello %s\n", b"world")
+printf("hello %s\n", b"world")